Wiper mechanism for windshields and the like



Nov. 17, 1931. J. BORNSTEIN WIPER MECHANISM FOR WINDSHIELDS AND THE LIKE Filed Sept; 7. 1929 4 Sheets-Sheet 1 Nov. 17, 1931. J. BORNSTEIN WI PER MECHANISM FOR WINDSHIELDS AND THE LIKE 4 Sheets-Sheet 2 a t z ave/7660 7 Filed Sept. 7, 1929 w & W

K asg J. BORNSTEIN 1,832,084

4 Sheets-Sheet 3 Nov. 17, 1931.

WIPER MECHANISM FOR WINDSHIELDS AND THE LIKE FiledSept. 7, 1929 & \T U M Fk w ww V wmavw Q \Q HVUK ww r x Nov. 17, 1931. J. BORNSTEIN WIPER MECHANISM FOR WINDSHIELDS AND ,THE LIKE Filed Sept. 7. 1929 4 Sheets-Sheet 4 7711) vz-o 7 Patented Nov. 17, 1931 urrso STATES PATE oFiFioE v JOSEPH BORNSTEIN, 015 BOSTON, MASSAGHUSETTS, ASSIGNOR TO LO'UIS BORNSTEIN, F

. QUINCY, MASSACHUSETTS WIPER MECHANISM FOR wmnsninrns AND THE LIKE Application filed September My invention relates to wiper or cleaning machanisms for Windshields, windows and the like, and it has for its object to improve the construction thereof and to provide a mechanism of this class which will be of simple, efiicient and inexpensive construction.

Tothese ends I have provided a mechanism of the class described having the peculiar features of construction and mode of operation set forth in the following description, the several novel features of the invention being particularly pointed .out and defined in the claims at the close thereof.

a In the accompanying drawings:

Figure 1 is a front elevation'of the upper portion of a windshield equipped with a wiper mechanism constructed in accordance with my invention, said mechanism being shown in section on the line 11 of Fig. 2.

Figure 2 is a section on line 2-2 of Fig. 1. Figure 3 is a section on line 33-of Fig. 2. Figure 4 illustrates a modification of the form of my invention shown in Figs. 1 to 3, inclusive. Figure 5 is a section on line 55 of Fig. 4. Figure 6 is a cross sectional view of a Wiper mechanism illustrating a modification wherein a driving motor is provided that is sup ported by the wiper carrier.

stem 9 of'a wiper element 10 that is yielding-- Figure 7 is a cross sectionalv-iew illustrating another form of wiper mechanism.

Figure 8 is a section on line 8-8 of Figure 7.

The form of my invention illustrated in Figs.1, 2 and 3 includes a tubular sheet metal frame 1 that is rectangular in cross section" as shown in Fig.2 said frame being provided at its opposite ends with apertured lugs 2 fastened by screws 3 to the frame 4 of a wind-' shield in front of the glass pane 5 of the latter.

Within the tubular frame 1 is movably mounted a wiper carrier 6 made upon itsexterior with sockets within whichare'located'anti-friction balls 7 having rolling contact with the interior of frame 1. The frame 1 is formed upon its rear side with a longitudinal slot 8 through which projects tie ly held against the glass pane 5 of the wind- 7, 1929. Serial No. 390,893.

mediate its ends by isolated bearing blocks e 14 fastened in position within the tubular frame 1. At one end thereof the worm shaft 13 extends beyond the frame 1 and is adapted to be connected with any suitable means by which it is continuously rotated in one direction. The means for driving the worm shaft 13 may be an electric motor such as is commonly employed in mechanisms of this type, or said shaft may be connected by a flexible shaftwith a rotating part of the vehicle on which the mechanism is used. I v

The shaft 11 also has fixed on it a spur gear l5which continuously drives a spur gear fast on a short shaft 17 that is journaled in a bearing provided adjacent the free or outer end of a link member 18 which is pivotally mounted adjacent its opposite end upon the shaft 11.

The short shaft 17 also has fixed thereon a toothed wheel orgear 19 that is in mesh.

22 is made smaller than the opening 27 thereby providing a runway or groove 28 into which projectsone end of the shaft 17 as shown in Fig. 2. This runway is parallel with the rackof teeth 21 and provides an-endless guide slot for the shaft 17.

When the mechanism is in operationthe wormshaft 13 is continuously driven in one direction and operates through worm wheel 12, shaft I1','-'gears 15 and 16, and shaft 17 to continuously rotate the toothed wheel 19 in one direction and the latter is thereby caused ion V the toothed Wheel 19 to traverse the endless rack of teeth 21. As the toothed wheel 19 travels along the toothed rack 21 it acts through the link 18 to move the carrier 6 with it thereby reciprocating said carrier and moving the wiper element 10 back and forth across the windshield pane 5, the opposite side Walls of the runway 28 serving to guide the shaft 17 so as to maintain the rack 21*.

In the form illustrated in Figs. 4 and 5 -the rack 21a that is traversed'by the continuously rotating toothe'd 'wheel' 1'9 is constitiit'ed by:

a single roW of studs or pins projecting from a plate 22a secured in positionupon baseplate 23 within the aperture27 of the outer plate 26, said outer plate 26flbeing also fastened as before to the base plate 23. Otherwise the construetion .is approximately the 7 same as described in connection with Figs. 1,

2and 3. 4 V

I In the forniillustra'ted in Fig. 6 thetubular frame has its bottom wall made with a longitudinal slot 8a and the base plate 23 with the parts 22a and 26 mounted thereon, is fastened to the top wall of the frame 1d.

The wiper carrier of Fig. 6 in'cludes a sec- 7 tion (it; made with a pearing through which extends a vertically disposed armature shaft 29 of amotor 30, said motorbeing fastened in po sit'ioi'i' Within a housing. 31 which 'is supported by a strap or belt 'eXtendingaround thetubular frame 1a, said strap or belt 32 bein made upon its interior with sockets each holding an anti-friction ball 33 hearing. against theexterior of frame lit. Ad acent its up per. end the armature shaft. 29 isjfo'rmed with a pinion 34in mesh with ag'ear 16a fast on'on'e end of ash'ort shaft, 17 "a that is journale'din a bearing provided adjacent one end of aIl'ink18a. The opposite end: of this link.

31 andstrap 32 with it, thereby carrying the wiper element back and forth acrossthe windshield. I

In the form ofmy inventionshown in Figs. 7 and 8 the Wiper carrier 6?) has journaled upon it a shaft l'l carryin-ga wormwheel 12 that is continuously driven in one direction by. a wormshaft 13, and on this shaft 11 is also fastened a spur gear 15 driving another spur;v gear 16 fast" on the short horizontal shaft.

1 7.v :Thisshortshaft 17-is .journale'd in a bearproperly in mesh vvith' gear teeth 216 provided upon a plate 22?; thatis fastened by screws 241; to a base plate 236 which in turn is fastened to the front wall of the tubular frame 1. The toothed wheel 19?) is provided upon opposite sides -thereof with.v clrcular flanges 35 bearing against endless tracks 36 formed on the plate 226.

-A-'s in Figs.:1 and 2fthew'iper element of the form shown in Figs. 7 and 8 has its stem 9 'fasteneddirectlyto the carrier 6?).

The ;short shaft 17 of Fig. 7 extends through. a vertical slot 37"formed in a stop member'EES, the opposite ends of saidslot 37 serving as stops which, by engagement with the shaft 17, serve to hold the circular flanges 35 in engagement with the endless tracks 36 at all times except while the toothed wheel 19% is passing around the ends of the plate 22 The bar 3 8 is'made atits lower end with pockets within which are seated anti-friction balls -39having rolling engagement with the carrier 67) while the upperend of said bar is likewise. provided with anti-friction balls 39rhaving rolling engagement with the inner side of the top wall of the frame 1. When the mechanism of Figs. 7 and 8 is in operation, the continuously driven worm shaft 13 acts through worm gear 12, shaft 11, gears 15 and 16 and shaft 17 to continuously rotate the toothed wheel 19?) in one direction withthe result that "the latter. traverses the rack of teeth 21.

As the wheel 19a nears either end of the plate 22b-the circular flanges or wheels 35 enter into'engagement with an arcua'te track 40. 'projectingf-rom the base plate 23? said.

track serving by its engagement with the flanges 35 to maintain the toothed wheel 19b in proper engagement with the rack'2l while said toothed wheel is passing around the end of the plate 226.

As the toothed Wheel 19?) swings around either end of the plate 226 the link 18. is swung on the axis of the shaft 11 and the shaft17 is shifted from one end of the slot 37 into position. against the opposite end thereof. During 'thisbodily movement of the shaft 17 from one end of slot37 to the oppositeend thereof, the stopmember'38 is shifted back and forth sidewise on the carrier 6.5. Thus the member38 serves-to hold the toothed wheel 19?) in proper engagement With the rack 2l while said wheel is traveling from one cam track 40 tothe opposite cam track4l). V

Allof the above described formsof. my invention include-a stationary endlessrack around which travelsa continuously driven pinion ortoothed wheel that is mounted upon the same carrier which supports the wiper element.

What I claim is:

1. In a windshield wiper, in combination, a frame; a carrier movably mounted upon said frame; a wiper element connected with said carrier; a fixed rack of teeth on said frame; a toothed wheel rotatably mounted on said carrier and engaging said rack, and means for continuously rotating said Wheel in one -direction to cause the same to traverse said rack thereby to reciprocate said carrier and wiper element.

2. In a windshield wiper, in combination, a frame; a carrier movably mounted upon said frame; a wiper element connected with said carrier; a fixed endless rack of teeth on said frame; a toothed wheel rotatably mounted on said carrier and engaging said rack, and means for continuously rotating said wheel in one direction to cause the same to travel around said rack thereby to reciprocate said carrier and Wiper element.

3. In a windshield wiper, in combination,

carrier through which said shaft operates to rotate said toothed wheel continuously in one direction.

4. In a windshield wiper, in combination, a frame; a carrier movably mounted upon said frame; a wiper element connected with said carrier; a fixed rack of teeth on said frame; a shaft journaled on said carrier that is continuously driven in one direction; a link member pivotally mounted upon said shaft; a toothed wheel journaled on said link member and engaging said rack, and means through which said shaft operates to continuously drive said toothed wheel in one direction thereby to cause the latter to travel around said rack.

5. In a windshield wiper, in combination, a frame; a carrier movably mounted upon said frame; a wiper element connected with said carrier; a fixed rack of teeth on said frame; a shaft journaled on said carrier that is continuously driven in one direction; a link member pivotally mounted upon said shaft; a toothed wheel j ournaled on said link member and engaging said rack; means through which said shaft drives said toothed wheel; and means for guiding said toothed wheel in its travel around said rack.

6. In a windshield Wiper, in combination, a frame; a carrier movably mounted upon said frame; a wiper element connected with said carrier, a fixed rack of teeth on said frame; a shaft journaled on said carrier; a link member pivotally mounted on said shaft; a toothed-wheel rotatab-ly mounted on said link member and engaging said rack; means through which said shaft drives said toothed wheel to cause the latter to travel around said rack; means to guide said toothed wheel during its travel around said rack; a worm shaft journaled on said frame that is continuously driven in one direction and a gear on said first-mentioned shaft that is engaged and driven by said worm shaft.

7. In a windshield wiper, in combination,

a frame; a carrier movably mounted upon said frame; a Wiper element connected with said carrier; a shaft journaled on said carrier; a link member pivotally mounted on said shaft; a fixed endless rack of teeth on said frame; a toothed Wheel journaled on said link member and engaging said rack; means through which said shaft drives said toothed wheel to cause the latter to travel around said rack; means for guiding said toothed Wheel during its movement around said rack; a worm shaft journaled on said frame that is continuously driven in one direction, and a worm gear fast on said firstmentioned shaft and continuously driven in one direction by said worm shaft, said worm shaft being parallel with the path of said carrier.

Signed by me at Boston, Sufiolk County, Massachusetts, this 31st day of August, 1929.

' JOSEPH BORNSTEIN. 

